Andritz’s submersible motor expertise success

In one of the world’s largest oil and gas fields, the firstever underwater compressor system employs ANDRITZ submersible motors. With their renewable winding these maintenance-free designed pumps have achieved impressive outcomes.
We are surrounded by fuel. From water bottles to the insulation in our houses, pure gas is a key ingredient in virtually each product we use day by day. According to the newest report issued by the International Gas Union (IGU) in 2019, the worldwide demand in fuel has been rising by 35% of the past decade alone.
The causes for this pattern are manifold, however the IGU determines three major factors. First, the price competitiveness of gasoline in contrast to different power sources. Secondly, higher security of supply with regard to infrastructure, delivery, and flexible use. Thirdly, เครื่องมือวัดความดัน represents a sustainable type of energy that can mitigate climate change and lower localized air pollution. It has 50% fewer CO2 emissions in comparison with coal, for example.
In order to fulfill this growing demand and use, the eco-friendly potential gas will have to be extracted using a sustainable process. One of the largest techniques is the Åsgard oil and fuel field on the Haltenbanken, 200 km off the coast of Norway. It incorporates fifty two wells combined in 16 gasoline fields and linked by 300 km of oil pipelines. As of December 2018, the sphere has estimated sources of 9.9 million commonplace cubic meters of oil equal of oil and 51.1 million commonplace cubic meters of oil equal of gasoline.
The system used comprises three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there completely since extraction started in 1999. Åsgard B is a floating, semi-submersible gas and condensate processing platform for processing and stabilizing of fuel and condensate. This platform is supplemented by the condensate storage facility Åsgard C and the 707 km-long Åsgard fuel pipeline to the Karsto processing complex to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gasoline field with various gasoline field merchandise, techniques, and services since 2010. In time, the strain in the storage facility in gas-producing fields drops. Compressors are needed to sustain the output. Aker delivered the first-ever underwater compressor system worldwide to Åsgard in order to improve the output to 306 million barrels. These are usually put in on platforms above sea stage.
However, Åsgard is based on an underwater system. By using compressors on the seabed the restoration rates are improved and the funding and working costs are decreased. In addition, underwater compression leaves a smaller ecological footprint and is more reliable than a platform. The Åsgard system consists of modules for 2 equivalent sets of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, however essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, became ANDRITZ Ritz GmbH and a half of the ANDRITZ Group, as did the manufacturing of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are appropriate for driving deep well pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of utility, the motors can be made of cast iron, bronze or totally different type of stainless steel and put in either vertically or horizontally. These are water-filled and watercooled, three-phase asynchronous motors with squirrel cages and a mech- anical seal. They are fitted with MCT, a particular cooling technology. In designs with inside permanent magnet motor know-how, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, consequently, price savings.
The efficient and measurable motor cooling system retains the interior temp- erature as little as potential. Drinking water is used as a cooling liquid, which is why the motors can function in media of as much as 75° C. An impeller with optimized suction and delivery is mounted at the decrease shaft finish of the rotor. One of its two major duties is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there is a constant circulate of cooling liquid in the right direction.
This liquid strikes via the inside of the motor from the bottom to the highest. The specifically developed cooling channels define the precise path over all warmth sources to discharge the heat successfully and systematically. At the highest finish, the warmth from the liquid is then discharged by way of the motor’s outer wall. Here, it is transferred by way of the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are only a tiny part of the underwater compressor system, however they’re additionally an especially important part. The whole underwater station can’t operate without these motors to drive the pumps. Since first being installed in 2016, these submersible motors have been working without any faults. All in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor forms the condensate unit together with the pump and conveys these liquids which may be eliminated by the separator upstream of the fuel compressors.
In 2017, as a end result of a failure in part of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, throughout which an intensive examine was carried out. Thermal distribution within the cooling circulate and the hot spots were analyzed in additional element. The outcomes additionally led to the design of a model new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally utterly overhauled and fitted with a model new winding and a new rotor. This research and the implementation of its findings not solely profit the present customer and future prospects on this case, but also strengthen confidence within the ANDRITZ submersible motor expertise.